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Znarkus
Asked: 2011-07-20 00:26:33 +0800 CST

Grub prompt after upgrade to 11.04

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I realize that there are a lot of information on here/Google about this, but I think my problem is different.

grub

I upgraded 9.10 -> 10.04 -> 10.10 -> 11.04. 11.04 failed and I was stuck at the grub prompt. As you can see in the photo, I'm having a hard time loading anything from the disk.

I have three disks, /dev/sdc being the OS disk on which I have Ubuntu Server. This is a pure Ubuntu box.

Please help :'(

server

1 Answers

  1. Best Answer

    I booted the Ubuntu Server 11.04 CD and chose Rescure console. Clicked Esc until the main menu came up. Then selected Execute a shell.

    rescure mode

    I followed the instructions over at https://help.ubuntu.com/community/Grub2#ChRoot like @enzotib suggested. These are the commands I used, which are modified for the BusyBox shell.

    mount /dev/sdc1 /mnt
for i in /dev /dev/pts /proc /sys; do mount $i /mnt$i -o bind; done
chroot /mnt
/usr/sbin/update-grub
/usr/sbin/grub-install /dev/sdc
reboot

    After the reboot I was presented with

    error: no suitable mode found

    Yay. After a couple of reboots and some searching I came to understand I just had to wait, then Ubuntu would boot. After it did, I logged in and ran update-grub and then rebooted. Problem solved! Thank you @enzotib.

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